Answer: 167°
Explanation:
We know that a pair of angles is said to be supplementary angles if its sum is added up to 180 degrees.
If the measure of an angle is 13°, then the measure of its supplement will be :-
![180^(\circ)-13^(\circ)=167^(\circ)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/txobzbf1px933a1rrpdwq1j2xd6w608n9r.png)
Therefore, if measure of an angle is 13°, then the measure of its supplement will be 167°.